Scale guard and marker.



PATENTED OCT. 16, 1906.

fNo. 833,168.

J. R. KELLER. SCALE GUARD AND MARKER.

APPLIOATIOI FILED AUG. 14, 1905.

wk 10E INVENTOR WITNESSES.

, JOHN R.

KELLER, or PI'I'ISBURG, PENNSYLVANIA, ASSIGNOR T0 EDWARD F. SEELIG, OFCHICAGO, ILLINOIS.

SCALE Guano AND MARKER.

of Letters Patent.

Patented Oct. 16. 1906.

Application fled August 14, 1006- Berial Io. 274:.154.

To all whom it may concern:

Be it known that I, JOHN R. KELLER, a citizen of the United States ofAmerica, and a resident of Pittsb in the county of Allegheny and Stateof ennsylvania, have invented certain new and useful Improvements inScale Guards and Markers, of which the following is a specification.

This invention relates to J ard attachments for measuring-scales an todevice for sett' ofi measurements alongthe measuring e ge of a scale bymeans of a pin-point mounted directly upon the scale.

The main objects of this invention are to provide a simple. andinexpensive attachment for triangular scales which will serve the doublepurpgse of scaleard to indicate quickly to a aftsman w ch one of themeasuring edges. of the scale is being used and to assist him in settingoff measurements by perforating his paper at the limits of suchmeasurements an to provide a device of this character which ma beentirely constructed of sheet metal. accom lish these objects b the,device shown in t e accompanying awings, in which Figure 1 is aperspective view of a triangular scale provided wit a scale-guard andrickpunch attachment constructed according to this invention. Fig. 2 isa perspective view of the same, showing the attachment as viewed fromthe rear of Fig. 1. Fig. 3 is an end elevation of the scale andattachment. Fig. 4 is a development of the piece of sheet metal fromwhich the scale-guard and prickpunch is constructed.

In the drawings, the scale 1 is an ordinary triangular scale ada ted torest.on either of its faces and provi ed with graduations on each faceand along each e e, as is usual in scales of this type. Each ace of thescale has the usual 10 'tudinal groove 2 extending along its mid e line,and the transverse section of the scale is uniform throughout.

The scale guard and marker 3 is formed of a single st 'p of sheet metalcut to the shape shown in F1 4, being of substantial] uniform width g rthe greater part of its length and being pointed at one end to form a1nint 4, which serves as a marker. e strip of metal is provided withopposed transversely-extending l 5 near its other end. To form theguard, t e lugs 5 are first bent upwardly at right angles to one face ofthe accide strip. The strip is then bent upon itself to the 00p or han e8 at its middle part. Both end parts are then arched toward the sameside, the pointed part being outward. The

inner part is bent to fit the upper ed e of the scale and to form jaws 6and 7, whio engage the scale in the two grooves, which are adjacent tosaid upper edge. The resilience of the sheet metal normal y urges thegrippingjaws 6 and 7 toward each other, so that the guard will slidealong the scale,but will normally grip the same sufiiciently tight toremain at any position to which it may be set along the same. The jaw 7is a portion of the loop or handle 8. The arching of the outer part ofthe strip at 9 causes the same to exten over the top of the scale andlie between the ide-lu s 5 and across the graduated face 0 the sea e,with the inpoint close to the measuring edge thereof and approximatelyin the same plane therewith. The bending of the strip at the handle 8and at the point 9 is such that the pin-point 4 will normally lie closeto the graduated edge, but slightly raised from the surface upon whichthe scale is resting. By pressing downwardly upon the guard at 9 thepin-point 4 is forced lnto the paper or other surface upon which thescale is resti said pin-point being ginded by the lugs 5. As soon as thepressure of the finger is released the parts of the uard will return totheir normal position. indicated by the full lines in the drawings.)When pressure is exerted at 9 the parts assume the position indicated bydotted lines in Fi s. 1 and 3.

In operation the scale isi the 'paper by one hand, and the guard is slidalong the scale by asping the handle 8 with the other hand. hen thepin-point 4 has arrived at the desired graduation, it is driven into thepaper by a downward pressure of the finger at 9. This guard alsoprevents nta use of the wrong graduated ed e of the scale, since thepointer 1s always on t e side of the scale in use.

What I claim as m invention, and desire to secure by Letters atent, is

1. The combination of a graduated measuring-scale adapted to rest upon aplane surface, having aduations along one edge adjacent to sai surfaceand having a part extending throughout its length in parallel re lationwith said graduated edge; and a guard the movement of eld firmly againstIOC ably engage said part and adap face, having graduations'alongoneedge adjacent to-said surface and having apart extending throughout: itslength inzparall el re' lation with-said graduatededge; and-aguardformed of a single iece of resilient sheet metal; bent to slidab adaptedthrough its resilient structure to grip said part; and a pin-pointmounted on said guard and lying substantially in the plane of' saidgraduated edge, said pin-pointeingintegral with said guard and beingnormally lifted above the'me-asuri-ngedge of the scale through theresilient. structure of said :5 guard 3. The combination-"ofameasuring-scale having a graduated face inclined to the base thereof, aguard formed of sheet metal, beingadapted through elastic pressure toengage a portion of said scale above the base and be'-- 1ng slidablelongitudinally thereon, said guard being bent upon itself and having a.part extending over the topof the scale and ying substantially in theplane of said grad uated face, said part having a pin-point at its lowerend, said guard being adapted through its resilient structure'tonormally raise said pin-point'out of contact with the supporting-surfaceand being adapted to cause said pin-point to prick the supportingsurfaceat the lower edge 0 y engage said part and seams surface'whendownwardpressure is exerted on said guard.

' 4. The combination of a triangular scale having longitudinal groovesin two of' its faces; and a scale-guard comprisin a piece of resilientsheet metal bent around t e ed e of the scale which is between saidgrooved aces and slidably engaging said grooves and being then bent uponitself at one of said grooves and arched over the top of the scale toform a part extending transversely across the opposite;

face thereof, said'part havin a pin-point at itslower end: adapted to asupportingthe scale, said pinpoint being normally lifted out of contactwith said surface through the resilient structure of said guard, and anintegral guideon said guard for directing the motion oi said pin-point.

5. An article ofmanufacture, comprising a strip of sheet metalpeinted atone'endand havmg a 'air of opposed lugsextendingtransversely om itsedges near the, other end, said strip being bent upon itself to form aloop or handle near its middle part, both of the end partsbeingthenarched toward one side, the pointedart' being outward, and'the otherpartbeingl) v clamp-j aw, adapted to coactwithandnormally urged'towardthe handle by resilience of the-strip, and said lugs being bent upwardto serve as guides for the edges of said pointeeipart, substantially asdescribed Sign at Chicago this 28th day July, 1905. p v I vJOHNWitnesses:- T

E, A; RUMMLE'R, Enwann F. SEELIG.

